The onlooker said, “Rob and the brunette turned up around midnight. They were cute together. At one point, he was talking to someone and she wandered over and grabbed his hand and pulled him to over to near the pool. Their hands were all over each other!”

Meanwhile Robert and the girl have been going to the gym together in L.A.

X17 Photo reports, “The mysterious girl joins him every single day as Robert exercises for new flick.”

“Rob rarely hangs out with a girl he’s not dating He keeps to himself,” a photographer that spotted them told X-17. “So they fact they left in the car together definitely means something. Rob’s all over the place right now — he’s trying to replace Kristen and he’s going out a lot of widening his circle of friends. He wants to find a girlfriend.”

“Rob is having fun dating different girls right now. It’s taken him a long time to move on from Kristen, but he’s ready now. He’s not ready to settle down with just one girl right now. He’s just enjoying himself and taking things nice and slow. He doesn’t want anything serious.”